mirrors/qemu
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bsd-user/arm/target_arch_cpu.h: Only support FreeBSD sys calls

Browse Source 
Since we don't build on OpenBSD, only do FreeBSD system calls here. In
the future, we'll need to move this to some place like
bsd-user/freebsd/arm/mumble.h, but until then just leave this
inline. This reflects changes to the upstream.

Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Kyle Evans <kevans@FreeBSD.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2022-01-30 11:56:59 -07:00
parent 8f4b48164f
commit e555e709bb
1 changed files with 68 additions and 75 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

143
bsd-user/arm/target_arch_cpu.h
View File

@ -40,7 +40,6 @@ static inline void target_cpu_init(CPUARMState *env,
static inline void target_cpu_loop(CPUARMState *env)
{
int trapnr, si_signo, si_code;
unsigned int n;
CPUState *cs = env_cpu(env);
for (;;) {
@ -66,82 +65,76 @@ static inline void target_cpu_loop(CPUARMState *env)
break;
case EXCP_SWI:
{
n = env->regs[7];
if (bsd_type == target_freebsd) {
int ret;
abi_ulong params = get_sp_from_cpustate(env);
int32_t syscall_nr = n;
int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
int ret;
abi_ulong params = get_sp_from_cpustate(env);
int32_t syscall_nr = env->regs[7];
int32_t arg1, arg2, arg3, arg4, arg5, arg6, arg7, arg8;
/* See arm/arm/syscall.c cpu_fetch_syscall_args() */
if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
syscall_nr = env->regs[0];
arg1 = env->regs[1];
arg2 = env->regs[2];
arg3 = env->regs[3];
get_user_s32(arg4, params);
params += sizeof(int32_t);
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
params += sizeof(int32_t);
get_user_s32(arg7, params);
arg8 = 0;
} else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
syscall_nr = env->regs[0];
arg1 = env->regs[2];
arg2 = env->regs[3];
get_user_s32(arg3, params);
params += sizeof(int32_t);
get_user_s32(arg4, params);
params += sizeof(int32_t);
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
arg7 = 0;
arg8 = 0;
} else {
arg1 = env->regs[0];
arg2 = env->regs[1];
arg3 = env->regs[2];
arg4 = env->regs[3];
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
params += sizeof(int32_t);
get_user_s32(arg7, params);
params += sizeof(int32_t);
get_user_s32(arg8, params);
}
ret = do_freebsd_syscall(env, syscall_nr, arg1, arg2, arg3,
arg4, arg5, arg6, arg7, arg8);
/*
* Compare to arm/arm/vm_machdep.c
* cpu_set_syscall_retval()
*/
if (-TARGET_EJUSTRETURN == ret) {
/*
* Returning from a successful sigreturn syscall.
* Avoid clobbering register state.
*/
break;
}
if (-TARGET_ERESTART == ret) {
env->regs[15] -= env->thumb ? 2 : 4;
break;
}
if ((unsigned int)ret >= (unsigned int)(-515)) {
ret = -ret;
cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr);
env->regs[0] = ret;
} else {
cpsr_write(env, 0, CPSR_C, CPSRWriteByInstr);
env->regs[0] = ret; /* XXX need to handle lseek()? */
/* env->regs[1] = 0; */
}
/* See arm/arm/syscall.c cpu_fetch_syscall_args() */
if (syscall_nr == TARGET_FREEBSD_NR_syscall) {
syscall_nr = env->regs[0];
arg1 = env->regs[1];
arg2 = env->regs[2];
arg3 = env->regs[3];
get_user_s32(arg4, params);
params += sizeof(int32_t);
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
params += sizeof(int32_t);
get_user_s32(arg7, params);
arg8 = 0;
} else if (syscall_nr == TARGET_FREEBSD_NR___syscall) {
syscall_nr = env->regs[0];
arg1 = env->regs[2];
arg2 = env->regs[3];
get_user_s32(arg3, params);
params += sizeof(int32_t);
get_user_s32(arg4, params);
params += sizeof(int32_t);
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
arg7 = 0;
arg8 = 0;
} else {
fprintf(stderr, "qemu: bsd_type (= %d) syscall "
"not supported\n", bsd_type);
arg1 = env->regs[0];
arg2 = env->regs[1];
arg3 = env->regs[2];
arg4 = env->regs[3];
get_user_s32(arg5, params);
params += sizeof(int32_t);
get_user_s32(arg6, params);
params += sizeof(int32_t);
get_user_s32(arg7, params);
params += sizeof(int32_t);
get_user_s32(arg8, params);
}
ret = do_freebsd_syscall(env, syscall_nr, arg1, arg2, arg3,
arg4, arg5, arg6, arg7, arg8);
/*
* Compare to arm/arm/vm_machdep.c
* cpu_set_syscall_retval()
*/
if (-TARGET_EJUSTRETURN == ret) {
/*
* Returning from a successful sigreturn syscall.
* Avoid clobbering register state.
*/
break;
}
if (-TARGET_ERESTART == ret) {
env->regs[15] -= env->thumb ? 2 : 4;
break;
}
if ((unsigned int)ret >= (unsigned int)(-515)) {
ret = -ret;
cpsr_write(env, CPSR_C, CPSR_C, CPSRWriteByInstr);
env->regs[0] = ret;
} else {
cpsr_write(env, 0, CPSR_C, CPSRWriteByInstr);
env->regs[0] = ret; /* XXX need to handle lseek()? */
/* env->regs[1] = 0; */
}
}
break;